Wa Alaikum Salam.
Continue using 5w-30. Kixx fully synthetic 5w-30 is a good engine oil. If you wanna switch, then switch brand only, like Total Quartz 9000 Future Series 5w-30, but not the engine oil grade. You are using recommended engine oil grade.
That "someone" suggested you a Galat mashwara. Don't follow it. Thank you.